/* ============================================================
   PRACTICAL AI INSTITUTE — MAIN STYLESHEET
   practicalaiinstitute.org
   Colors: Navy #0A1628 | White #FFFFFF | Electric Blue #0057FF
   Accent Light: #E8F0FF | Gray text: #4A5568 | Border: #E2E8F0
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:       #0A1628;
  --navy-mid:   #112240;
  --blue:       #0057FF;
  --blue-hover: #0044CC;
  --white:      #FFFFFF;
  --light-bg:   #F7F9FC;
  --light-blue: #E8F0FF;
  --gray:       #4A5568;
  --gray-light: #718096;
  --border:     #E2E8F0;
  --font-main:  'Inter', 'Segoe UI', Arial, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  color: var(--navy);
  background: var(--white);
  font-size: 17px;
  line-height: 1.7;
}

/* ---- TYPOGRAPHY ---- */
h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; line-height: 1.2; margin-bottom: 1rem; }
h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
p  { margin-bottom: 1rem; color: var(--gray); }
a  { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.5rem; color: var(--gray); }

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.75rem;
  display: block;
}

blockquote {
  border-left: 4px solid var(--blue);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--light-blue);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--navy);
}

/* ---- LAYOUT ---- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 5rem 0; }
.section-light { background: var(--light-bg); }
.section-navy  { background: var(--navy); color: var(--white); }
.section-navy h1, .section-navy h2, .section-navy h3 { color: var(--white); }
.section-navy p, .section-navy li { color: rgba(255,255,255,0.85); }

/* ---- NAVIGATION ---- */
nav {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 1.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-logo span { color: var(--blue); }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }
.nav-cta {
  background: var(--blue);
  color: var(--white) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  font-weight: 700 !important;
  transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--blue-hover) !important; text-decoration: none !important; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; display: block; }

/* ---- HERO ---- */
.hero {
  background: var(--navy);
  padding: 6rem 1.5rem 5rem;
  text-align: center;
}
.hero h1 { color: var(--white); margin-bottom: 1.25rem; }
.hero .subhead { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 680px; margin: 0 auto 1rem; }
.hero .support { font-size: 1rem; color: rgba(255,255,255,0.65); max-width: 580px; margin: 0 auto 2.5rem; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.2s, transform 0.1s;
  cursor: pointer;
  border: none;
}
.btn:hover { background: var(--blue-hover); text-decoration: none; transform: translateY(-1px); color: var(--white); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--blue);
  color: var(--blue);
}
.btn-outline:hover { background: var(--blue); color: var(--white); }
.btn-white {
  background: var(--white);
  color: var(--navy);
}
.btn-white:hover { background: #f0f0f0; color: var(--navy); }
.btn-sm { padding: 0.6rem 1.25rem; font-size: 0.9rem; }

.cta-group { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; align-items: center; margin-top: 0.5rem; }
.cta-link { color: var(--blue); font-weight: 600; font-size: 0.95rem; }
.section-navy .cta-link { color: rgba(255,255,255,0.75); }

/* ---- CARDS / GRID ---- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.75rem; }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.card-navy {
  background: var(--navy-mid);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--white);
}
.card-navy h3 { color: var(--white); }
.card-navy p  { color: rgba(255,255,255,0.8); }
.card-icon { font-size: 2rem; margin-bottom: 1rem; display: block; }

/* ---- STATS / CALLOUT ---- */
.stat-block {
  text-align: center;
  background: var(--navy);
  padding: 4rem 1.5rem;
}
.stat-num {
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  display: block;
}
.stat-label { font-size: 1.1rem; color: rgba(255,255,255,0.8); margin-top: 0.5rem; max-width: 560px; margin-left: auto; margin-right: auto; }

.callout-box {
  background: var(--light-blue);
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
}
.callout-box-navy {
  background: var(--navy-mid);
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

/* ---- GUARANTEE BLOCK ---- */
.guarantee {
  background: var(--light-blue);
  border: 2px solid var(--blue);
  border-radius: 12px;
  padding: 2.5rem;
  margin: 2.5rem 0;
}
.guarantee h3 { color: var(--navy); font-size: 1.3rem; margin-bottom: 1rem; }
.guarantee p  { color: var(--gray); }
.guarantee-conditions { font-size: 0.85rem; color: var(--gray-light); margin-top: 1rem; font-style: italic; }

/* ---- PRICING TABLE ---- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2rem 0; }
.pricing-card {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
}
.pricing-card.featured {
  border-color: var(--blue);
  box-shadow: 0 4px 20px rgba(0,87,255,0.15);
  position: relative;
}
.pricing-card.featured::before {
  content: "MOST POPULAR";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 3px 12px;
  border-radius: 20px;
}
.pricing-card h3 { font-size: 1.3rem; margin-bottom: 0.25rem; }
.pricing-card .participants { font-size: 0.9rem; color: var(--gray-light); margin-bottom: 1.25rem; }
.pricing-card .deposit { font-size: 2rem; font-weight: 800; color: var(--navy); line-height: 1; }
.pricing-card .deposit-label { font-size: 0.8rem; color: var(--gray-light); margin-bottom: 0.5rem; }
.pricing-card .success-fee { font-size: 0.95rem; color: var(--gray); margin: 0.5rem 0; }
.pricing-card .total { font-size: 1rem; font-weight: 700; color: var(--navy); border-top: 1px solid var(--border); padding-top: 0.75rem; margin-top: 0.75rem; }

/* ---- STEPS / PROCESS ---- */
.step-number {
  width: 44px;
  height: 44px;
  background: var(--blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  flex-shrink: 0;
}
.step-card { display: flex; flex-direction: column; }

/* ---- YES / NO LISTS ---- */
.qualifier-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; margin: 1.5rem 0; }
.yes-list li::marker { color: #16A34A; }
.no-list  li::marker { color: #DC2626; }
.yes-list li, .no-list li { color: var(--gray); }

/* ---- RESULT TIERS ---- */
.tier-block { display: none; }
.tier-block.active { display: block; }
.result-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.75rem;
  display: block;
}
.result-callout {
  background: var(--navy);
  color: var(--white);
  border-radius: 10px;
  padding: 1.5rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0;
}

/* ---- EMBED CONTAINERS ---- */
.embed-container {
  background: var(--light-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  min-height: 620px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}
.embed-placeholder {
  text-align: center;
  color: var(--gray-light);
  font-size: 0.95rem;
}
.embed-placeholder strong { display: block; font-size: 1.1rem; color: var(--navy); margin-bottom: 0.5rem; }

/* ---- FOOTER ---- */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding: 3rem 1.5rem 2rem;
  font-size: 0.9rem;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 1.5rem;
}
.footer-brand .logo { font-size: 1rem; font-weight: 800; color: var(--white); margin-bottom: 0.4rem; white-space: nowrap; }
.footer-brand .logo span { color: var(--blue); }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-links a { color: rgba(255,255,255,0.65); font-size: 0.88rem; text-decoration: none; }
.footer-links a:hover { color: var(--white); }
.footer-copy { text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.4); }

/* ---- LEGAL PAGES ---- */
.legal-content { max-width: 780px; margin: 0 auto; padding: 4rem 1.5rem; }
.legal-content h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.legal-content h2 { font-size: 1.2rem; margin: 2rem 0 0.75rem; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
.legal-content p, .legal-content li { font-size: 0.95rem; }
.legal-meta { font-size: 0.85rem; color: var(--gray-light); margin-bottom: 2rem; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin-left: auto; margin-right: auto; }
  .qualifier-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .nav-links { display: none; flex-direction: column; background: var(--navy-mid); position: absolute; top: 68px; left: 0; right: 0; padding: 1rem 1.5rem; gap: 1rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero { padding: 4rem 1.25rem 3.5rem; }
  .section { padding: 3.5rem 0; }
  .card { padding: 1.5rem; }
  .guarantee { padding: 1.75rem; }
}